SYNOPSIS

DESCRIPTION

fputc() writes the character c, cast to an unsignedchar, to stream.
fputs() writes the string s to stream, without its terminating null
byte ('\0').
putc() is equivalent to fputc() except that it may be implemented as a
macro which evaluates stream more than once.
putchar(c) is equivalent to putc(c,stdout).puts() writes the string s and a trailing newline to stdout.
Calls to the functions described here can be mixed with each other and
with calls to other output functions from the stdio library for the
same output stream.
For nonlocking counterparts, see unlocked_stdio(3).

RETURNVALUE

fputc(), putc() and putchar() return the character written as an
unsignedchar cast to an int or EOF on error.
puts() and fputs() return a nonnegative number on success, or EOF on
error.

CONFORMINGTO

POSIX.1-2001, POSIX.1-2008, C89, C99.

BUGS

It is not advisable to mix calls to output functions from the stdio
library with low-level calls to write(2) for the file descriptor
associated with the same output stream; the results will be undefined
and very probably not what you want.

SEEALSO

COLOPHON

This page is part of release 4.04 of the Linux man-pages project. A
description of the project, information about reporting bugs, and the
latest version of this page, can be found at
http://www.kernel.org/doc/man-pages/.